It is a coalition of bishops, archbishops and lay people from around the world. They hail from churches in the southern hemisphere - Africa, Asia, Australia, South America - but also enjoy the support of unhappy conservative evangelicals from the US, Canada and England.

What do they want?

They want to provide an alternative global network for conservative evangelicals who are unhappy with liberal or progressive agendas in their own churches.

Is it just about homosexuality?

Gay clergy and same-sex unions are the main irritant for those seceding from the Anglican communion; however, Foca members are also unhappy with the west's failure to proselytise to non-Christians.

How will they do this?

There are already measures in place for conservative parishes and dioceses to join provinces reflecting their own values. Foca will set up similar structures, especially in places needing greater attention such as England, where a gay "marriage" between two clergy scandalised conservatives.

How much support does Foca have?

Its members represent around half of the world's 77 million Anglicans.

Why does it matter?

Their actions are a huge religious challenge for Anglicanism, symbolising a post-colonial power grab of global proportions.

Who will lead Foca?

No names have been put forward, but it is likely that the Archbishop of Sydney, Peter Jensen, will be a key player.

What about Rowan Williams?

He remains Archbishop of Canterbury, but his status and office are tarnished after years of criticism.

What does this mean for English

Anglican churches?

Churches could opt out of the Anglican communion and join Foca if they sign up to an orthodox reading of the Bible, oppose the ordination of gay clergy and same-sex blessings and adopt a more fundamentalist approach to their faith.

Who will pay for Foca?

The Archbishop of Nigeria, Peter Akinola, wants Foca bodies to be self-supporting, with no acceptance of foreign money. Rebel churches in the US are well-funded and equipped to set up future permanent structures. There are also wealthy US Christian donors who would donate money towards the establishment of a shadow communion.

Is this a schism?

Foca members say they are not overthrowing Williams or creating schism, but their actions inevitably undermine church unity.

What happens now?

The Foca leadership team meets in six weeks to discuss the next steps.